Lubricating device



Feb. 24, 1931. c. L. zABRlsKlrav ,1,794,131

LUBRICATING DEVIC'E Y Drginai Filed Jan. 27, 1926 M, t f' d ,i

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h mw' IIIIIIIIIIIIIIIII Patented Feb. .24, 1931 UNITED STATES e PATENT OFFICE CHARLES L. ZABBISXIE, OF NEW YORK, NQY., ASSIGNOR, BY MESNE ASSIGNMENTS, TO ROGERS PRODUCTS C0., INC., A. CORPORATION OF NEW JERSEY LUBRICATING DEVICE Original application iiled January 27, 1928, Serial No. 84,101. Divided 'and thil application iiled October 1, 1928, Serial No. 809,445.

My present invention is disclosed in my application Serial No. 84,101, tiled January 2 1926, of which this case is a division. 'lhe same essential features are shown in slightly different combination in my gior appllcation Serial No. 74,680, filed ecember 11, 1925, of which this case is a continuation in art. p As in said application SerialNo. 84,101, the invention is shown as embodied in a device primarily designed for use as a grease gun for forcing grease through the ducts of bea-rin s on automobiles and other machinery. he device includes a force-feed reservoir adapted to be charged with, enough grease for lubricating many ducts, in combination with means for controlling and if desired boosting the pressure derived from the reservoir, the means shown including a plunger pump having an intake port adapted to be uncovered by the plun er so that the reservoir can discharge theret rough at moderat-J pressures. If this pressure is not suiiicient, the plunger may be operated as a single-acting force ump.

A practically important detail of the device herein claimed relates to the recharging of the reservoir with grease after it has been emptied. The reservoir is acylinder having a rigidly secured closure at one end through which slides a rod having a piston at its lower end and encircled b adapted to forcefeed the grease from the reservoir toward the opposite end of the cylinder, the latter end being detachably screwthreaded to another closure having the outlet and means for controlling outfiow of grease therethrough.

The lpiston rod has a'n exterior handle and is formedor provided adjacent to the piston with a radial enlargement referably in the form of projecting studs. he end closure of the cylinder has corresponding passages through which said studs may be withdrawn when the piston is retracted tofill the same with grease. The studs may be shifted out of registry with these passages by rotation of the rod in which position they serve as detents to hold the piston in the retracted position against the pressure of the spring. Prefa powerful spring Renewed August 7, 1930.

erably there are other locking recesses on the outer face of the closure into which the lugs may be forced by the spring.' In this position the handle and rod may be used as a wrench to unscrew the cylinder for iilhng,

or to screw it in place' again after filling.

The above and other features of my invention will be more evident from the following description in connection with the accompanying drawings, in which Fig. 1 is a longitudinal section in a plane including the axis of the reservoir and also the axis of the pump chambers; and

Fig. 2 is a detail section on the line 2-2,

grease in the cylinder is shown as compris- .w

ing a piston, which may consist simply of discs, 6, 7, between which is clamped the body portion of a cup washer, 8, as by riveting the head, 9, of the piston guide-rod, 10, which extends through the rear closure, 2,' and may be provided with a handle,l 11. The

iston may have pressure applied to it in any desired Way, as by spiral spring, 12, the resilience of which will be designed to normally force 'the piston to the extreme position where all of thegrease has been expelled through the fitting, 4. Preferably, the piston rod, 10, is provided with a cross-pin, 13, adapted to be Withdrawn through slots, 14, to fully retract the piston against the pressure of the spring. Theslots, 14, serve as vents or breather holes to permit escape of sol air when the piston is retracted and also to 4 admit air behind the piston .during its forward, force-feeding movement. The piston and spring may be held in a retracted position by rotating the rod, 10, to bring the pin, 13, ont of registry with slots, 14, and, if de,- sired, notches, 15, may be formed in a boss 1n the rear end of closure, 2, in which the pin, 13, may be seated and held from displacement by pressure of the-compressed spring. In this position, the handle, 11, may be used as a wrench to unscrew the cylinder from the fitting, `4. Grease may be then charged in through the open end of the detached cylinder,- andv thereafter 1 the cylinder may be again screwed to position and the piston released by rotating the rod, 10, to permit' the pins to pass through the slots, 14, under the Influence of the spring, 12. Thereafter, the spring will apply su stantial pressure for feeding the grease and this may be supplemented by further hand pressure through the handle, 11. In the position of parts shown in the drawings, grease under such pressure will flow freely through a pump intake, 16, into a pump cylinder, 17, and out through `a pump,Y outlet, 18, for discharge throng? any suitable coupling member that may. reservoir feed of grease may be stopped at any time either by advancing the .pump plunger, 20, until the inlet port, 16, is covered thereby or by retraeting the piston as described above.

. The'plunger, 20, is connected-by pivot, 21,

with fork lever arm, 22, fulcrumed on pivot lso 23, link, 24, and pivot, 25, by which the link is secured between suitable guiding faces, P

26, in an extension, 27, of fitting, 4. The long power arm Aof the lever, 28, preferably has itsk hand grasp end, 28a curved toward the reservoir cylinder, 1, so that als the lunger approaches the end of al feeding stro e, said lhandle becomes more nearly parallel with the cylinder which forms a cooperating hand grasp for forcibly reciprocating the pump.

I claim :`l

1. A reservoir for lubricant having en d closures, one normally locked. against rotation and the other rotatably and detachably secured, the' latter closure bein -provided with a service outlet and means or control ling outflow of grease therethrough; a piston within the reservoir'and spring meansfor applying pressure thereon to force the lubricant towardthe outlet; means Eextending through the non-rotatin end closure for retractingf the piston Yfor re llin of the reservoir through the outlet end; ateral projections associated with the piston retracting means and corresponding openin s throu h which they lma lbe withdrawn t rough t e normally .close end closure for rotation out of registry therewith to retainthe piston 1nretractedV position; and means for locking `said projections against rotary movement with respect to the reservoir, whereby the retracting means may be employed as a wrench to rotate the reservoir to attach or detachthe same from the outlet closure."

2. Avreservoir for -lubricant having end closures, one normally locked a ainst rotascrewed into the nozzle, 19. Such;

for applying pressure thereon to force the lubricant toward the outlet; means extending through the non-rotating end closure for retracting the piston for refilling of the reservoir` through the outlet end; said retracting means and reservoir including releasably interlocking elements,'whereby the retracting means may be used' as awrench for rotating and disengaging 'the reservoir from the outlet end closure.

3. A reservoir for lubricant having end closures, one o f which is rotatably and detachably secured, and is provided with a service outlet and means for controlling outflow of grease therethrough; a piston within the reservoir and spring means, for 'applying pressure thereon to force the lubricant toward the outlet end; a iston rod extending throught-he other en closure and provided withA an exterior handle` for retracting the piston for refilling of the Yreservoir throuvh the outlet end; a laterahpojection on t e piston rod and a `coacting'element on the closure adapted to be engaged by said ro`- jection upon a longitudinal movement o the iston rod, whereby the reservoir maybe rotated to detach same from the outlet closure. l 4.

4. A reservoir foi' lubricant having end closures, one of which is rotatably and de,-y

for applying piston rod-and' a coacting e ement on the closure adapted yto be engaged by--said projection Aupon a longitudinal movementof the piston rod to lretain the piston in retracted position against the pressure of the spring,

whereby the reservoir maybe rotated to dctach same from the outlet closure.

Signed at Cooperstown, in the county of Otsego and State of New York this 28th day of September, A. D. 1928.

CHARLES L. ZABRISKIE.

tion and theother rotatably a'n detachabl Y.

secured, the latter closure. being prcwvide 1 

